Houston Community College Inc Algebra

Before we begin graphing systems of equations, a good starting point is to review our knowledge of 2-D graphs. These graphs are known as 2-D because they have two axes. Find an online image of a graph to use as the foundation of your discussion. (This is easily accomplished by searching within Google Images.)

Using your graph as the example:

• Select any two points on the graph and apply the slope formula, interpreting the result as a rate of change (units of measurement required); and
• Use rate of change (slope) to explain why your graph is linear (constant slope) or not linear (changing slopes).